ATN/GNSS Seminar Varadero, Cuba 6 to 9 May 2002 Overview of GNSS

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ATN/GNSS SeminarVaradero, Cuba6 to 9 May
2002Overview of GNSS

• Presentation GNSS 1.1 by
• V. Iatsouk, GNSS Panel Secretary
• ANB/ICAO

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ICAO definition of GNSS

• A world-wide position and time determination
  system, that includes
• one or more satellite constellations
• aircraft receivers
• system integrity monitoring
• augmented as necessary to support the required
  navigation performance for the intended operation

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GNSS-related work areas

• GNSS standardization (SARPs)
• Operational issues
• Institutional and legal issues
• Economics
• GNSS transition planning

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GNSS standardizationmethodology

• Core elements (satellite constellations)
• Augmentations
• Non-aircraft and aircraft elements
• Evolutionary integration of new elements

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Scope of GNSS SARPs (Annex 10, Volume I,
applicable as of 1 November 2001)

• Establish GNSS as a new standard aid to
• navigation and
• approach and landing

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Scope of GNSS SARPs

• GNSS elements defined
• GPS
• GLONASS
• aircraft-based augmentation system(ABAS)
• satellite-based augmentation system (SBAS)
• ground-based augmentation system (GBAS
• receivers (essential characteristics)

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Present GNSS capabilitiesdefined in SARPs

• Six performance levels and respective
  functionalities defined for
• en-route
• non-precision approach (NPA)
• approach with vertical guidance (APV)
• Category I precision approach
• Other performance levels yet to be defined

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APV types

• LNAV/ BaroVNAV
• APV-I
• APV-II

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GNSS performance levels by alert limits
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Recent GNSS enhancements(Amendment 77 to Annex
10)

• SBAS Message Type 28
• GBAS positioning service
• GLONASS-related requirements for SBAS and GBAS

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Status of GNSS elements

• GPS
• 28 SVs operational, modernization programme under
  way
• Block IIR-M SV (L2C) launches to begin 2003
• Block IIF SV (L5) launches to begin 2005

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Status of GNSS elements (contd)

• GLONASS
• 9 SVs in orbit, 6 operational without
  limitations
• plans to expand up to 18-20 SVs by 2005 including
  GLONASS-M
• planning for GLONASS-K after 2010

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Status of GNSS elements (contd)

• GALILEO
• Funding for development phase released
• Development and validation (2002-2005)
• Deployment (2006-2007)
• Operational phase 2008
• SBAS (WAAS, EGNOS, MSAS)
• Operational 2003-2005

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Status of GNSS elements (contd)

• GBAS
• two basic configurations (Cat I PA Cat I PA
  with GBAS positioning service)
• VHF data broadcast options with horizontal
  (GBAS/H) and elliptical (GBAS/E) polarization
• certified Cat I GBAS stations in US (LAAS) and
  Europe in 2002-2003 time frame

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Status of GNSS elements (contd)

• ABAS avionics
• RTCA (EUROCAE) MOPS/MASPS
• RTCA DO-208
• EUROCAE ED-72A
• FAA Technical Standard Order (TSO)
• TSO-C129A Level 2 (En route/Terminal)
• TSO-C129A Levels 1 or 3 (NPA)

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Status of GNSS elements (contd)

• SBAS avionics
• RTCA (EUROCAE) MOPS/MASPS
• RTCA DO-229C
• EUROCAE (under development)
• FAA Technical Standard Order (TSO)
• TSO-C145
• TSO-C146

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Status of GNSS elements (contd)

• GBAS avionics
• RTCA (EUROCAE) MOPS/MASPS
• RTCA DO-24, 246 and 253
• EUROCAE ED-95
• FAA Technical Standard Order (TSO)
• under development

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Further work on GNSS

• GRAS (ground-based regional augmentation system)
• GLONASS-M
• GPS L5
• GALILEO
• Category II/III GBAS
• architectures to support aerodrome surface
  operations, guided take-off, curved approaches

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Status in related areas

• Transition to WGS-84
• Data base quality and integrity
• RF spectrum protection
• Procedures, criteria, phraseologies, charts
• Institutional and legal issues
• Costs and cost/benefit issues

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WGS-84 and data base quality

• Steady progress is being made
• Some States notified differences
• Global implementation of GNSS not possible before
  world-wide compliance is achieved

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GNSS spectrum aspects

• Current allocations
• Allocations to support system enhancements
  and expansion
• RF compatibility issues

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Operational issues

• PANS-OPS criteria for basic GPS receiver
  available
• Criteria for SBAS and GBAS approach procedures
  under development
• Phraseologies and charting requirements under
  development
• NOTAM procedures reviewed
• Flight plan information reviewed

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GNSS legal/institutional issues

• ICAO Assembly Resolutions A32-19 and A32-20
• Work on legal aspects of CNS/ATM systems in
  progress
• 33 rd Session of Assembly reviewed status of work

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Costs and cost allocations

• Assembly Resolution A32-19
• Cost allocation issues
• multi-modal services
• allocation options
• Studies to continue

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COM/OPS/95 Strategy(Annex 10, Volume I,
Attachment B)

• Flexibility versus single standard
• Three standard systems included
• ILS Fully implemented some sustainability
  issues exist or perceived
• MLS Limited implementation Categories I, II and
  III capability is proven and available
• GNSS Category I capability to be validated
  feasibility studies for Categories II and III to
  continue
• MMR implementation encouraged
• Time frames projections
• Category I GNSS available 2000-2005
• Category II, III GNSS available 2005-2015

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Major trends since COM/OPS/95

• GPS-based operations spreading (en-route, NPA)
• Augmentations development progresses with delays
• GLONASS declined
• GNSS (GPS) vulnerability recognized
• Sole means concept no longer advocated
• Development of new GNSS elements advances (GPS
  L5, Galileo)
• Marginal user support for SBAS and GBAS services

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Policy aspects

• Emerging navigation issues require
• revisions of the ICAO Global Air Navigation Plan
  for CNS/ATM Systems
• updates of the ICAO strategy for approach and
  landing operations
• amendments to SARPs affected by GNSS introduction
• Need for ICAO meeting established to review GNSS
  development status and navigation strategy

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Conclusions

• Transition to satellite navigation is a long term
  commitment
• ICAO and industry standards available to support
  near-term and mid-term applications
• SBAS service, GBAS stations and respective
  avionics will be generally available in the near
  term
• Near-term focus to continue on approvals for
  en-route (oceanic and remote), terminal and NPA
  operations using basic GPS avionics
• Mid-term focus on SBAS-based APV and GBAS-based
  Category I PA

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Conclusions (contd)

• Two core satellite systems and dual frequency
  operations to begin beyond 2010
• User community commitment to transition is
  crucial factor
• ICAO 11th Air Navigation Conference (22
  September-3 October 2003) to review GNSS status
  and navigation policy issues

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(No Transcript)